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Asian Gold reserves DB
Penjom Gold Mine (Malaysia)
      paishanlou gold mine (china)
      gaolong gold mine (china)
      ..................
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  Page 296
 
اولينقبليبعديآخرين
   Deposit Geology
   A diverse sequence of well-bedded tuffaceous siltstone and sandstone (of both dacitic and andesitic provenance), pebble conglomerate, carbonaceous shale, calcareous shale-sandstone and minor limestone dominates the mine stratigraphy. These belong to the Permian Padang Tengku Formation of the Raub Group (Richardson, 1939; Lim et al, 2001). The stratigraphy strikes NS and dips to the east on a regional scale, but within the mine area it has an EW-strike and southerly dip.
   The Penjom Thrust is the dominant feature controlling the distribution of ore in the Kalampong and Manik pits. This strikes NE (035°) and dips to the southeast (30-40°).
  

View of open pit of Penjom Gold Mine
    Considerable shear stresses along the Penjom Thrust have remobilised much of the carbon within the shale sequence to form a graphitic “alteration” zone. This, together with sheared and milled rock, makes the Penjom Thrust an impermeable horizon (Lim et al, 2001).
   Perhaps the most significant unit in the mine area is the tonalite intrusion complex. This is a series of competent, narrow sills (typically less than 5 metres thick) that are folded along with the host stratigraphy. They also have minimal thermal aureoles and chilled margins (< 20 cm). These observations suggest that the tonalitic magma intruded under near-equilibrium conditions (400°C at 5-10km depth) prior to the peak structural deformation event (Bogie, 2002).
  
 
 
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